[quote=xAsunaWolfx]Because it can be offensive.[/quote]

And is Gravity now offensive too? What about vaccines? Cancer Treatment? Your car? The very device you're using to read this post?
Are any of those offensive?

Evolution is the same thing, a result of science in our search for the truth. 
It's a fact of history, there's nothing to be offended about. To put in another example though just to get my point across.

If I pointed to your mother and said "That's your Mom, she gave birth to you" would you find it offensive that your Mom gave birth to you?
It's where you came from, it's a known and proven scientific fact just like Evolution is.